The research aims are to know the correct age in root slaughtering, the correct consentration of coconut water, and its interaction. The research was held in Kadilangu, Kauman, Batang during 4 months. Experiment plan which is used 12 random category plan, that arranged factorialy. The first factor is the age of slaughtering root, consist of 3 levels for instance 2, 3, 4 weeks of after seedling (woas). The second factor is consentration of coconut water, consist of 4 levels they are 0; 33,3; 66,6; 100%. There are 12 various of treating combination, each combination is repeated three times, so there are 36 experiments. The variabel being observed are growing procentage, plant height leave amount for each plant, leave width, branch diameter, plant wet weight, plant dry weight, length of the largest root, amount of sekunder root, and root dry weight. Research result shown that the age of slaughtering root influereed to all variabels being observed apparently, except on growing procentage. The best growing reached on 3 woas age of slauthtering root. The effect of the consentration of coconut water is apparently to all variabels, except on growing procentage, best growing reached on 100%. There is correlation among age of slaughtering root and consentration of coconut water to plant wet weight, length of the largest root and amount of sekunder root. The best combination is on 3 woas age of slaughtering root with 100% consentration of coconut water.

Key word: Mahagany seed, age of slaughtering root, and consentration of coconut water.

FPT0091

630. LAK.P

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